UTC is Enough for Everybody, Right?
summary
Argues for storing timestamps in UTC everywhere but also persisting the full IANA time zone id alongside them, uses ISO 8601 for APIs, and recommends ActiveSupport TimeZone, the IANA tz database, moment.js, the time element, chronic, and ice_cube (RFC 5545) for recurrences. Advises prefilling events or brute‑force recurrence records when possible, and pushing formatting/zone logic to the client. Mentions building a calendar startup called during which hasn’t launched so its production behavior remains uncertain.
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